Dave,
It still sounds like your monitor may be on the way out (I'm trying to help you out here). And, the big LCDs are also big productivity enhancers, so the sooner you switch the sooner it will start paying for itself. Besides, they are MUCH easier on the eyes resulting in even more savings in better health and lower doctor's bills. What's more, chicks really dig guys with big... LCDs.
I use a 23" (it's great) so you'll have to ask Dwight about the big three ohhh!